NSN 4820-01-186-4721 68205566, 6820556-6, 01-186-4721
Product Details | VALVE SEAT
4820-01-186-4721 A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT.20248100015Valves, Powered48200018Valves, Nonpowered
Part Alternates: 68205566, 6820556-6, 4820-01-186-4721, 01-186-4721, 4820011864721, 011864721
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 10 AUG 1984 | 01-186-4721 | 22113 ( SEAT, VALVE ) |
Drawings & Photos | NSN 4820-01-186-4721
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Technical Data | NSN 4820-01-186-4721
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | B6 PLAIN |
| OVERALL HEIGHT | 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| BODY OUTSIDE DIAMETER | 0.665 INCHES MINIMUM AND 0.666 INCHES MAXIMUM |
| BODY INSIDE DIAMETER | 0.344 INCHES MINIMUM AND 0.346 INCHES MAXIMUM |
| MATERIAL | COPPER ALLOY OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS4640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | NOT RATED |
| SEATING SURFACE SHAPE | RADIAL |
| SEAT RADIUS | 0.218 INCHES NOMINAL |
| MANUFACTURERS CODE | 63005 |
| DESIGN CONTROL REFERENCE | 6820556-6 |
Restrictions/Controls & Freight Information | NSN 4820-01-186-4721
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||